Why do surgeons use a tv thing when they're performing surgery on a patient?

it is much less invasive than cutting large enough to see by eye,requires less healing time

They have a little camera in the area.  That way the incision is way smaller and healing is faster.

to see how their patients are doing in the state their in. Those machines/tv things usually tell the heartbeat of the patient and things to know about the patient.

It's easier to see what they're doing when it's on a screen.  It would be very hard to see clearly into somebody's body.

because the human eye is not very good at seeing things and the tv has it zoomed way in , and i think they do it for more accurate incisions and more close up look

Here we go again - building up surgeons to be like demi-gods!

  They ARE human too you know and have their addictions to the soaps (usually pre-op) and dramas (usually mid-op) and searching investigative documentaries (usually post-op) same as the rest of us - Jeeez.

When they perform surgery laparascopically the surgeon does not actually cut the patient open. The make really small incisions and insert tools through those incions, including a scope, or camera, then they can see what they are doing inside via this scope on the television screen. It is very common to remove the gallbladder this way, to do scopes of the upper and lower gastrointestinal system, and other surgeries this way. Not all surgeries are performed with a T.V. Patients having laparoscopic surgery can often go home the same day and have a faster recovery than when they had to be fully opened up!

http://www.webmd.com/digestive-disorders/laparoscopy-16156

It does actually happen. The surgeon is using an endoscope, basically a telescope to look inside the body, almost always with a camera attached to the outside end which feeds an image to a TV screen. In theory the surgeon could manage by looking straight down the tube with an eyepiece, but that would mean contorting himself in all directions as he worked round the inside. Indeed, they used to do that, and very funny it was to watch. It really is much better for him to stand or sit still looking at the screen while his hands guide the instruments. The other benefit of the TV screen is that everybody in the operating theatre can also see what is going on.

Not all surgery can be performed through an endoscope, but when it is possible it leaves the patient with much smaller scars and hurts a lot less.

that is because they need an larger image of what they are doing or a clear image and if some surgeons do not have the same general view they can get he look of what view they are missing.